Boris Johnson will make an announcement on the final stage of the government's roadmap out of lockdown at a press conference from Downing Street this evening.

The prime minister is expected to confirm that the date to lift the final restrictions in England will be delayed.

The government had planned to reach step four of the roadmap on June 21 at the earliest, but that date now looks set to be delayed for four weeks to July 19.

A delay to lockdown lifting will mean that the current limits on social gatherings stay in place, while nightclubs will remain closed and large events will still be constrained to venue capacity limits.

The press conference is due to start at 6pm tonight, and Mr Johnson will be joined by England’s chief medical officer Professor Chris Whitty and the government’s chief scientific adviser Sir Patrick Vallance.

The PM is expected to tell tonight's briefing that a delay to the final stage of the roadmap will allow more time for people to receive a second dose of the coronavirus vaccine.

It comes as cases of the Delta variant of coronavirus, which originated in India, continue to drive up infections across the country.

The variant of concern is now responsible for up to 96 per cent of new Covid-19 cases, according to Public Health England.

We'll have live updates from the prime minister's press conference below...

Press conference due to begin shortly

The press conference is due to begin in just a few minutes.

Boris Johnson will be joined by Professor Chris Whitty and Sir Patrick Vallance.